I ran BF Goodrich KO's for many years with no problems except tire life. Maybe 40,000-45,000 on a set. When they went to the KO2's. I started having problems with rock cuts and punctures. Here in Arizona elk country volcanic rocks are all over the place. Mud and snow can also be a problem depending on the weather.
I now run Faulken Wildpeaks, 10 Plys and I don't have the problems with rocks anymore. Several other family members and friends are also running the Faulken Wildpeaks and all have positive reports including very good tire life, 60,000-75,000 miles. They are great in the mud and seem about average in snow.